21207804975

素因数分解:

$3^2\times 5^2\times 7^1\times {\mathrm{2851}}^1\times {\mathrm{4723}}^1$

素因数の和:7597

約数の個数: 72

約数和(自身を含む): 43436461952

約数和(自身を除く): 22228656977

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 35, 45, 63, 75, 105, 175, 225, 315, 525, 1575, 2851, 4723, 8553, 14169, 14255, 19957, 23615, 25659, 33061, 42507, 42765, 59871, 70845, 71275, 99183, 99785, 118075, 128295, 165305, 179613, 212535, 213825, 297549, 299355, 354225, 495915, 498925, 641475, 826525, 898065, 1062675, 1487745, 1496775, 2479575, 4490325, 7438725, 13465273, 40395819, 67326365, 94256911, 121187457, 201979095, 282770733, 336631825, 471284555, 605937285, 848312199, 1009895475, 1413853665, 2356422775, 3029686425, 4241560995, 7069268325, 21207804975]

約数ペア:

[(1, 21207804975), (3, 7069268325), (5, 4241560995), (7, 3029686425), (9, 2356422775), (15, 1413853665), (21, 1009895475), (25, 848312199), (35, 605937285), (45, 471284555), (63, 336631825), (75, 282770733), (105, 201979095), (175, 121187457), (225, 94256911), (315, 67326365), (525, 40395819), (1575, 13465273), (2851, 7438725), (4723, 4490325), (8553, 2479575), (14169, 1496775), (14255, 1487745), (19957, 1062675), (23615, 898065), (25659, 826525), (33061, 641475), (42507, 498925), (42765, 495915), (59871, 354225), (70845, 299355), (71275, 297549), (99183, 213825), (99785, 212535), (118075, 179613), (128295, 165305)]